Note 8 - Derivatives and Hedging Activities - Changes in Fair Values of Derivative Financial Instruments (Details) - Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Parent [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Unrealized loss at beginning of period, net of tax	$ (20,221)	$ (4,373)
Amount of gain (loss) recognized in other comprehensive income, net of tax	1,114	(14,847)
Unrealized loss at end of period, net of tax	(19,979)	(20,221)
Caplet Amortization.
Amount reclassified from accumulated other comprehensive income	$ (872)	$ (1,001)